// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef NET_TOOLS_QUIC_QUIC_SPDY_CLIENT_STREAM_H_
#define NET_TOOLS_QUIC_QUIC_SPDY_CLIENT_STREAM_H_

#include <stddef.h>
#include <string>
#include <sys/types.h>

#include "base/macros.h"
#include "base/strings/string_piece.h"
#include "net/quic/quic_protocol.h"
#include "net/quic/quic_spdy_stream.h"
#include "net/spdy/spdy_framer.h"

namespace net {

class QuicClientSession;

// All this does right now is send an SPDY request, and aggregate the
// SPDY response.
class QuicSpdyClientStream : public QuicSpdyStream {
public:
    QuicSpdyClientStream(QuicStreamId id, QuicClientSession* session);
    ~QuicSpdyClientStream() override;

    // Override the base class to close the write side as soon as we get a
    // response.
    // SPDY/HTTP does not support bidirectional streaming.
    void OnStreamFrame(const QuicStreamFrame& frame) override;

    // Override the base class to parse and store headers.
    void OnInitialHeadersComplete(bool fin, size_t frame_len) override;

    // Override the base class to parse and store headers.
    void OnInitialHeadersComplete(bool fin,
        size_t frame_len,
        const QuicHeaderList& header_list) override;

    // Override the base class to parse and store trailers.
    void OnTrailingHeadersComplete(bool fin,
        size_t frame_len,
        const QuicHeaderList& header_list) override;

    // Override the base class to handle creation of the push stream.
    void OnPromiseHeadersComplete(QuicStreamId promised_stream_id,
        size_t frame_len) override;

    // Override the base class to handle creation of the push stream.
    void OnPromiseHeaderList(QuicStreamId promised_id,
        size_t frame_len,
        const QuicHeaderList& header_list) override;

    // ReliableQuicStream implementation called by the session when there's
    // data for us.
    void OnDataAvailable() override;

    // Serializes the headers and body, sends it to the server, and
    // returns the number of bytes sent.
    size_t SendRequest(SpdyHeaderBlock headers, base::StringPiece body, bool fin);

    // Returns the response data.
    const std::string& data() { return data_; }

    // Returns whatever headers have been received for this stream.
    const SpdyHeaderBlock& response_headers() { return response_headers_; }

    size_t header_bytes_read() const { return header_bytes_read_; }

    size_t header_bytes_written() const { return header_bytes_written_; }

    size_t trailer_bytes_read() const { return header_bytes_read_; }

    int response_code() const { return response_code_; }

    // While the server's SetPriority shouldn't be called externally, the creator
    // of client-side streams should be able to set the priority.
    using QuicSpdyStream::SetPriority;

    void set_allow_bidirectional_data(bool value)
    {
        allow_bidirectional_data_ = value;
    }

    bool allow_bidirectional_data() const { return allow_bidirectional_data_; }

private:
    // The parsed headers received from the server.
    SpdyHeaderBlock response_headers_;

    // The parsed content-length, or -1 if none is specified.
    int64_t content_length_;
    int response_code_;
    std::string data_;
    size_t header_bytes_read_;
    size_t header_bytes_written_;
    // When true allows the sending of a request to continue while the response is
    // arriving.
    bool allow_bidirectional_data_;

    QuicClientSession* session_;

    DISALLOW_COPY_AND_ASSIGN(QuicSpdyClientStream);
};

} // namespace net

#endif // NET_TOOLS_QUIC_QUIC_SPDY_CLIENT_STREAM_H_
